Considering how the main changes between the two are primarily power amp and output switching options, I would have to believe the Roadster is nearly identical in regards to preamp, PI, and one FX Loop with the Road King. The power amp itself is probably really close. Since it can run as 6L6 only, that configuration is likely the same. The switching will be what is most modified on the Roadster.

Otherwise, all the modes on all the channels are there. Look at a Road King schematic and see.

For a Roadster, just take this schematic without the Prog. Linkage, Switchable FX Loops, and Switchable Speaker Outputs. The Progressive Linkage uses relays RYA, RYB, and RYD. The Switchable Speaker Outputs use relays RY4 & RY8. Most of the JFETs in the FX Loop are for the Switchable FX Loops.

hey, I received all the boogie schematics from Tremoverb over any other Recto to MarkV directly from mesa by simply contacting them. Apart from the switching architecture, the values of the parts are the same on the DR TR Roadster or Roadking - And we all know those amps sound and feel very different. What ever it is what makes them different, it is not written on the schematics - it is the PCB itself. The boards sound all different.